Lathe-feeding mechanism



. to the required angle.

UrvrTnn STaTns ldaTnivT OFFICE.,

MOSES Y. RANSOM, OF OLEVELND, OHIO.

LATHE-FEEDING MECHANISM.

LPCPICTION forming part of Letters Patent No. 307,332, dated October 28x 1884.

Application filed May 20, 1884. (No model.)

To all who/i1, it may concern: l in the blank. The cutter-head and cutters are of the ordinary construction, and well known Beit known that I, MosEs Y'. Ransom, of Cleveland, in the county of Cuyahoga and State l to the trade, and it is therefore not considered of Ohio, have invented certain new and useful l necessary to further describe them. Improvements in Feeding Mechanism for Mak- B is a guiding-box, and is provided with the ing Spiral Moldings; and I do hereby declare i longitudinal semieircular channel B', in which the following to be a full, clear, and exact dethe blank O will fit easily. The box is provided with the vertically-guiding pins b, b', b, and Z13. rlhe upper portion of the pin b is scription ofthe invention, such as will enable others skilled in the art to which it pertains l to make and use the same. threaded and provided with a nut, b5, and the My invention relates to feed mechanism for upper portion of the pin b is provided with a making spiral or cable moldings. the object lateral slot and key, b, as shown. Spiral being to provide one or more feeding-knives springs b/L are placed, as shown, around two set obliquelyto Vthe axis of the blank, and so ofthe guiding-pins, and preferably around all of them, and when the parts are in position these springs are between the box B and the arranged that the edges ofthe knives will engage and slightly crease the blank, and cause plate E. The plate E has a central vertical hole, c', and' circular slots c2 concentric with it to be fed endwise when it is revolved. A further object is to provide an adjustable knife-holder in which the desired number of the central hole, c'. When this plate is in poknivcs maybe secured and readily adjusted sition, the curved corners e engage the said A further object is to guiding-pins of the box B, by means of which secure the knife-holder in such a manner that the plate is held horizontally, but has a limit may easily be removed. A further object ited vertical movement between spring bt, be.-

low the plate, and the spring H, that is located above the plate, as hereinafter shown.

is to provide springs or equivalent n1echanism by means ot' which the feeding-knives are yieldingly held in contact with the blank. The knife-holder consists of a datand, preflVith these objects in view my invention crably, square plate, F, with ,pendent :danges consists in certain features of construction, f around the edges, forming an inverted open and in combination of parts, hereinafter deboxlikcholder,inwhich any numberof knives, scribed, and pointed out in the claims. G, are set with the backs resting against the In the accompanying drawings, Figure 1 is plate F, and separated by the blocks g, prefaplan view of my improved device attached erably of wood, and held in position firmly by to a table over revolving cutters. (Not shown.) one or more set-screws,f, that engage thread- Fig. 2 is a view in perspective of the guide ed holes in the flange f, as shown. The plate box and attachments. Fig. 3 is a transverse F is provided with a central pin,f2, that passes vertical section of thc knife-holder and atthrough the hole e', and the plate F is held firmly against the plate E by the bolts f", that pass through the slots e2 and screw into the tachments. Fig. 4 is an enlarged plan View of the plate to which the knife-holder is atl tached. Fig. 5 is a view in perspective of a4 plate F. 3y loosening these bolts the knifefeeding-knifc. Fig. 6 is a view 'in perspecholder may bc turned ou the center pin,f2, to tive of a modified knife-holder. Fig. 7 is a adjust the knife to the required angle with the blank. Vhen the parts are in position, as shown in Fig. l, the forked ends of the spring H embrace, respectively, the pins b and b', with view in perspective of a spring hereinafter described. Fig. 8 is a plan view of a piece of iinished Work, showing a spiral groove on one portion of the same.

A represent-s a table, under which is journaled the shaft A', provided with the driving pulley a, and has attached a cuttenhead, (not shown,)l in which are secured cutters of the proper shape for cutting the desired grooves tral part of the plate E, and by means of the -nut l) and the key b the spring H is made to press down the plate 'E onto the spring bL un-I til t-he edges of the knives G, secured, as aforesaid,iin the holder and set at the required anits depressed central part resting on the cen- 9 IOO , but one feeding-knife is required, but for heavy gle, engage and cut slight diagonal creases on l the blank. As the blank is revolved by hand or otherwise, these creases lead around the blank, like the thread of a screw, and the blank, by means of such engagement with the knives, is fed along th rough the guiding-box l5 and over the revolving cutters, resulting in a spiral groove being eut on the blank that will have more or less lead, according tothe angle of the knife with the axis of the blank. The feeding-knives should be set in such relative positionto the revolving cutter that the latter, in cutting the spiral grooves, will obliterate the creases made by the former. For light work work several knives are preferable. Il the operator while turning the blank will press more or less against the rear end ofthe blank to aid the knives in feeding the same, the knives will regulate the feed, when set, so as to cut creases in the blank that are hardly notice able when the work is finished.

In a large class ot' work, one variety ol` which is shown iu Fig. S-for instance, banisters, newel-posts, columns, te-the spiral groovf ing is only required to be cut over one portion i ofthe blank. ln such eases the blank is laid i in the box B in such position lengthwise that l the revolving` cutters will commence the work at the required point. The plate E and attachg ments are then placed in position andthe blank l l l l is revolved until it is il'ed along to the point where the spiral groove is to end, and the work is then removed from the .feedbex rlhe key t" is only thrustinto the slot bythe ti ngers, and is easily withdrawn, after which the spring H and the plate and attachments are quickly removed and as easily again placed in position. A guiding-box with a suitablesized channel is required for each different size of blank; but the guiding-pins maybe so arranged that one plate E will iit different guiding-boxes that have, respectively, different-sized channels. Then a guiding-box is required of such large l size that a large plate is required to span it, i the saine knife and knife-holder may still be r used, it' the hole c and the circular slots in the large plate are properly arranged. l

For temporary purposes, in place of the aforesaid plate l'l and attached knife-holder, a wooden trough, similar to that shown in Fi (5, may be employed, with diagonal grooves cut with a saw, the whole structure resembling a common miter-box. The knives G are set in the bottoni ot' the grooves, so that the edges slightly protrude in the trough, as shown. This structure may be litted between the guiding-pins of the part l alulsccured between the springs 7)* and ll, as alrlady described. Of course, theknives in sueh a device are not ad justable; but still it may be used vto good advantage for temporary 1mi-poses.

lVhat l claim is il. In a machine for cutting spiral moldings, one or more knives arranged obliquely to the longitudinal axis ofthe blank, and constructed to i'eed said blank to the cutter, substantially as set forth. V

2. In a machine for cutting spiral moldings, the combination, with a box and a knife-hold er, of stationary feeding-knives arranged in said knife-holder obliquely in the line ot motion ofthe blank, substantially as set forth.

3. In a machine for cutting spiral` molding, the eomliination, with a box and aknifenholrt er adjustably secured to said box, of one or more feed i ng-k aires removably secured in said holder.

'In a machine for cutting spiral molding,

the combination,with afeedingbox, cfa knife` holder yieldingly secured to the feedingbox, and knives secured to the holder, substantially as set forth.

5. In a machine for cutting spiral molding, the combination, with a feeding-box, oit' the adjustable knife-holder, knives removably secured in said holder, and springs for yieldingly holding the knives against the blank, substantially as set forth.

In testimony whereof l sign this speeitieation, in the presence of two witnesses, this 13th day of May, 1854.

A MOSES Y. RANSOH. lVitnesses:

Giras. H. Donnie, ALBERT E. LYNorr. 

